Very simple LCD unit with almost no external components, driven directly by a computer printer port.

A simple intruder alarm controller I build and used in my old apartment. Uses an AVR ATtiny2313 microcontroller.

A desk panel box full of LEDs, buttons and switches. Built for the rack box project.

33 high intensity LEDs are controlled with a AVR ATtiny2313 microcontroller. Four flashing patterns that can be set manually or cycle through. Uses an AVR ATtiny2313 microcontroller.

RS-232 interface module, with voltage measurement. Used to communicate with the emergency power off unit in the Rack box project. Installed inside Rack box status panel. Uses an AVR ATmega8 microcontroller.

Light intensity and temperature sensors; with white, green, yellow, red and blue signal LEDs and a buzzer. RS-232 communication. Uses an AVR ATmega8 microcontroller.

In my old apartment I built a lot of different LED lights.

Simple unit to silence the audible alarm on a production equipment, uses an AVR ATtiny2313 microcontroller.

RS-232 interface module, with 9 inputs and 9 outputs. Uses an AVR ATmega8 microcontroller.

Measures the power consumption by counting LED pulses from the home fuse box. Measurements can be read via a serial interface, uses the AVR ATtiny2313 microcontroller.